Computing scale



Y B. W. KING. coMPumG SCALE. Y.

armcmou men lau-2a. lszo. 1,408,793. Patented Mar. 7, 1922.

, Y s sHEErS-snrn 2.

citizen of the United States, residin oni-'reo sia'resv PATENT OFFICE.

izmir w. iIINe, or Demon, memoiiiv, AssIeNon fro BARNES' SCALE comm, or DETROIT, MICHIGAN, A eonrons'rIoN or MICHIGAN.

conforme 'scum Specification of Letters Patent.

Patented Mar. 7,. 1922.

/ Application mea' iieemter as, lazo. semi no. iszos.

To all whomfz't may concern.'

.Be it known t at I, BERT W. KING, a 'at Detroit, in the county of Wayne and tate of Michigan, have invented certain new and useful Improvements' in Computing Scales, of which the following is a specification.

This invention relates to computing scales,

and has for its object a computing scale pro`` vided with a bearing arrangement which prevents the platform from tilting and riding up on its bearing when a load is put on one side of the. platform. -Another feature of the invention is a simple arrangement whereby the drumoperating'lever is prevented from jumping out Yof or riding up its bearings without the use ofthe customary counterweight. v

- The novel arrangement of the operating parts is such that the platform is really sup' ported by a pair of links whose'only purse is to maintain it in upright position while vthe thrust. of the platform is communicated directly' to the drum-operating lever, which plays no part in supporting the platform in its erect position. These features will behest understood afterthe detail is explained.

Fig. 1 is a cross section through thc hase of the scale housing showing the. operating parts mainly in side elevation.

Fig. 2 is a plan View of the operating parts taken 0n the line 2-2 of Fig. l.

Fig. 3 is an end elevation of the operating parts taken from the left hand end of Fig. l.

Fig. 4 is a fragmentary section taken on the line 4 4 of Fig. 1.

Fig. 5 is a cross section taken on the. line 5-5 of Fig. 4.

Fig. 6 is a. section on the linel ('r-G of Fig. 4.

The pedestal is designated a.: the base of the housing by.' .0 indicates the usual dash pot; rl the yoke that straddlcs the dash pot and that at its lower end has a knife edge connection with the drum-actuating lever e. The platform is designated f and is provided with the usual glass slah supporting posltionbsreason of the usual parallel levers orlin In this case the arallelogram4 is strictl speaking o ne of links, namely, the para lel upper links l, l, connected by a cross' bar m and a cross bar n. Onithe swinging end of these links is supported a.

pair of double edge knives o, the saine beingscrewed to the ends of the upp levers or links by the screws p end prevented from turning b the dowel pills q. An 4te bearing r is soldered into the depending leg f the platform f and is pmvided with the usual slot which engages over .the upper knife edge of the double edge knife o. In line withv this upwardly-directed edge isii downwardly-directed edge which engages in the V agate block s of the push link t. This push link is made u of a channel'strip u (see Fig. 5) to whic is clamped a. pair of agate block rests fu, v by means of the spacing plate w. The channel strip u has reduced portions at -top and bottom turned over to form hooks a: whichengage the outer ends of the agate blocks and in conjunction with the agate block restsv form a secure clempfor the agate blocks when the spacing plate 'w is screwed to the channel strip by the screw y. .This forms e very the s ide bars 2 that are part of the Y-like casting that forms.` the drum-actuating lever n. These double edged knives 1 are provided with a. second knife edge downwardly directed and in line with the upwardlydirected knife edge This second down earthy-directed knife edge has a very iin- -portant functional connection with the platfornnas will presently appear.

Screwed to the side of the depending leg of the plat-form is a Z-slniped hanger 3, the screws 4 passing through slots 5 in the hanger. Through the -upper har of this Z hanger runs an adjusting screw 6 into the bottom of the platform f. Hence the screws 4 and 6 may be loosened and the hanger dropped down as far as it will go and then the screw 6 turned carefully to (pull the 4hanger up to the precise point of a justmcnt required to bring the link 7 nicel),r up against the downwardly-directed knife edge 8. When the proper position has been secured the adjustment may be made permanent b tightening the screws .4. It'will be notice that this ink 7 has a circular open' 9 that engages with: the knife edge 10 led or ground in the upper surface of the bottom bar of the Z h r 3. Hence it will be seen A that 'thehanger' 3 and the link 7 break at the stem due to an eccentric load is lint I0. If a load be placed on the extreme ont or rear of the platform slab 101, its natural tendency is to tip the platform stem and thereby cause the agate block to shift on the knife edge of the upper lever or link. This, of course, introduces an error into the weighing operation. By my improved construction any tendency to tilt the platform resisted by the link and the hanger 'pulling upwardly on the downwardly-directed knife edge of the knife l secured to the drum-actuating 2ffflever. In short, the-knife edges, directe 2liA away from each other, of the knives o and 1 Aare connected together by what amounts to a clamp that breaks near its center of neces- A not throughan upper lever. Of course, in

truth a thrust doesrcome through the, upper lever but inasmuch as the thrust of the platform is on a point along the lever in a direct line with the thrust from the lever to the push link, the lever is really np lever at all but simply a link or radius arm that in connection with the lower checklink constrains the platform stem to always remain in vertical osition. ,I

The pus link is substantially arallel with the platform stem Whenthefsca e registers half its capacity. This arrangement of push link has an im ortant relation with the clamp formed byv t e hanger 3 and liiik 7. If `the ush link were removed f m the oint o parallelism. with .a straig t line rawn through the knife supporting the platform and the knife edge 8, this way of tying a platform from tipping in its bearing would be an impossibility for the reason that the knife edges have to be aligned in pairs.

A Stamped strip in the form of a yoke 11 engages betweenthe push link and the clam ing link to' hold the clamping link in a sullistantially 'vertical plane.

The upper link or lever l is prevented from jumping out of its bearings or riding up on its bearings by using a double edged knife 12 (see Fig. 3), the downwardly-di` rected edge of which e ges in the V agate block 13` and the upwa-r edge of which 1s in ,bearing to make possible the use off line with the downwardlydirected edge and enga against the clam ing bar 130 which may loosened up or c amped down upon the upwardly-,directed knife edges by means that-the screw 20 is threaded into one wallof the U, the check link being constructed amnuts 15 and which turn into the cross of -spring'materiaL By loosening the lock nut 21 and turning the screw 20 the length of theA check link'may be adjusted slightly to accord it with the upper links or levers.

A suitable thermostat 22 is shown in the drawings, but inasmuch Vas it is no part of the invention herein claimed and as other thermostats suitable for this Vother than to Say that a urpose are shown in the prior art, no detailed descrip. tion is n hook 23 is secured to the arm 24 and bolted 1 to the drum-actuating-lever 25. This. hook@ 23 engages the ribbon;26 which asses overv the thermostatic C-like spring e ements 27.

This construction is claimed in a co-pending ap lication No. 381,246. l

n -the claims, the lever e is desi ated'a drum actuating member but ob v1oi ,xsly lit could be used with other indicating or registering mans and hence this designation must beunderstood a's one ofdescription rather than limitation.

It will be apparent that, although the thrust link must be in line with the platform that prevents the tipping' of the platform,on the other hand the c amp or tie maybe used anywhere wherethe thrust 'link and knife ed e and erforms the useful function o f holding the nife ed'ges intozthe bearings onthe thrust link.

The same arrangement as-fs used for keeping the upper lever lfromJumping out of its bearings is used onthe o poste end of the scale at the fulcrum for t e drum-actuating lever, the parts bein i similarly designated except for the ad ition of afn1it namely, 12* designates h knife, 130" designates the clamping bar, and 14' designates the clamping screws.

What I claim is:

l. In a computin scale, the combination of a platform, a. p atform stem below the platform, parallel swinging members supporting the same, a drum-actuating lever, and a thrust link connection with the drumactuating lever having a bearing substantially at the same point along the upperswingmg member as the point of connection of the bearing are usedfbetween the levers the double edged;`

i latfomi and stem therewith, said thrust ink servi Y to commumcate the movement. of the 'plat orm to the drumfactuating lever.

2. In a computingscale, the combination of a platform, a platform stemA parallel swinging members supporting the same, a separately *fnlcrumed drum-actuating lei-cr.v and an Iactuatingconnect-ion between the upperswinging member and thedrunx-actuating lever having a bearing on the upper swinging member at substantially the saine point therealong as the point of connection between the platform stem and platform and .the said lever. p

3. ln a, computing scale, the combination of a platform, a platform stem, parallel swinging members or supporting the same, a. drum-actuating lever provided with a pivot member, a. push link between the upper swinging. member and the drum-actuating lever having a bearing on the upper swinging member at substantially the same point as the connection between the platform and platform 4stern with said lever and a. bearing enfthe drum-actuating lever aligned with said pivot, and a clamp depending from the platform and engaging with the pivot member for avoiding the deranfremcntrof the connection between ihe platfbrm and stem and the upper swinging member.

L In a computing scale. the combination of a platform, a platform stem. parallel swinging members for supporting the same,

. a drum-actuating lever. a push link between the upper Swinging member and the drumactuating lever having its conn'eetion with the upper swinging member'substanliall)v at thelsame point as the connection of the platform and platform stem therewith, a pivot member aligned with the point of connection between the )ush link and drumactuating lever. and a e amp extending from the platform and stem down to and engaging with the aid pivot member to prevent derangement of the platform and stem upon their support.

5. In a computing scale, the combination of a platform. a Alatform stem, parallel swinging membersv or supporting the same,

a drum-actuating lover, n push link connecting the upper swinging member. with thel drum-actuating lever and having a bearing with the upper swinging member substantially at the sarnc. point along the, member as thc connection between the platform and -stem and the said member, a pivot member aligned with the pointof engagement of the lower end of the push link with the drumactuating lever. aud a clamp breakiugbetween its two ends for tying the lower side ofthe said pivot member to the platform and stem to prevent the derangement of the connet-tion between the platform and stem and the upper swinging member.

6. In a computing scale, the combination of a. swinging member, a lever, a double edged knife having aligned but oppositelydirected edges secured-to the swinging membcr. a double edged knife having oppositelydirected knife edges in alignment and secured to the lever, a push link connecting thc opposed knife edges of thetwo knives,

and a tie operating to tie the non-opposed edges of the two knives together to prevent derangemcnt of the knife edges and 'their engaging members.

. ln a computing scale. the combination of a swinging member. a lever. a double prevent derangementv of the knife edges and` bearings. S. In a computi-ng scale. the combination of a member, a swinging member supporting the same, a push link, a double edged knife secured tothe swinging member and having an upper knife edge supporting the firstmentioned member, a lever provided with av double edged knife. a push-link engaging between the opposed edges of the two said knives. and a clamp connecting the firstmentionedlmember with the downwardlydirected knife edge of the knife secured to the lever and provided with means for taking up the looseness in the clamp.

9. ln a computing'sealc` theV combination of a member. a swinging member supporting thc samt'. n knife having upwardlyl and downwarally-directed edges secured-'to the swinging member` a lever. e knife han-ing oppositidy-directed edges secured tothe. lever.J a push lilik connecting the opposed edges of the two knives. a V bearing connected with the first-mentioned member for supporting the same on the upwardlyfdirected edge of the knife secured to the swir ging member, a

Acei'ticnllv-adjlistable hanger supportedson the first-uu-ntioned membclxand a link having a hinging connection with said hanger and adapted to engage thc downwardly-dircetcd edge of the knife secured to the. lever.

lil. ln a computing scale. the. combination of a member. a swinging member "supporting the same. a V bearingsupporting the firstmentioned member. a knife with upwardly and downwardly directed edges secured to the swinging member` a lever, a. second knife with upwardly and down ardly` directed edges secured to the lever, a link connecting the opposed edges of the two knives, a hanger roughly in the form of s. Z adjustably connected with the first-mentioned member and provided with a knife edge, and

a link engagin the knife edge on the hanger anden aging t e'downwar y-directed edge of `the nif'e secured to the lever.

- 11.- In a computingscale, the combination of a fulcrum su port comprising one or more 4 V bearings, a ever, a double edged knife positely-directed but aligned edges in each -ingtlie knife, the downwardly-directed edges engaging in the V bearings, and a bar reaching from oneknife to the other and adjustablfy clampable u onthe upwardly-directed kni e edges to hol the downwardly-directed knife edges roperly in their bearings.

13. n a computing scale, the combination of a drum-actuating lever, a fulcrum support thereforand two aligned but oppositely-directed knife edges between the drumactuatin lever and the support for supportever u on the fulcrum support and preventing shi ting in the bearings.

14. In' a computing scale, the combination of a drum-actuating lever, a fulcrum suport, and two ali ed but oppositely directed linife edges an V bearings between the drum-actuating. lever and the support for supporting the lever Vupon the support and 'preventing shifting in its bearings.

15. In a, computing scale, the combination o f a fulcrum-support provided with V bearings, a' drum-actuating lever having one or more knives having oppositely-directed but aligned edges,` .the downwardly directed edges engaging in the V bearings, and means for en aging the upwardly-directed edges for. ho ding the downwardly-directed edges in their, bearings.

'16 Ina computing scale, the combination .0f a Aleveror link member comprising a straight bareircept for a U-like bend therein intermediate its ends, and means for contracting or allowingI the same to expand to var the length of the lever t 1 In a-omputing scale, tile combination of a lever or linkA having a vportion formed into a U-like bend, a screwthrea ded through lthe two walls of such bend for contracting or allowin the bend toexpandto alter the length of t ie lever or link.

18. In a computing scale, the combination of a platform, a platform stem, a pair'.V of

"parallel swinging members fo supporting the same, a separately fulcrumed drum-actuating lever, a connection between the latform and stem and the drum-'actuating ever to actuate the latter, and a secondconnection between the same members toL 'revent the' platform. an stemupon displacement of the -their support.

19. In a computing-scale, the combination of a latform,A a platform stem,a pair of paral el swinging members :forl supporting the same, a separately fulcriixfned'drum-actu V .swinging member and? the leverprovidedN with knife edge bearings, and al tie connection between the u wardly pointing knife edge and downwar ly pointing'knife edge for preventing the derangement of the bear ings. l 3

21. In a computing scale, the combination of a platform, a platformstem, a pair of parallel swinging members for supporting the same, 'a separately fulcrumed drumfactuating lever, and means 13o-operating with the drum-actuating lever for preventing the dernngement of the platform and stein upon their support.

22. In a computing scale, the combination of a platform, a platformstem, .a swinging member for supporting the saine in vertical position, a separately fulcrumed driim-actii ating lever, two knives having o positelydirected but aligned edges, one on t'he swinging member and one on the drum-actuating lever, and means for connecting the knives together for both thrustin the drum-actuat' ing-lever and tying the pla orm to its 'knife edge bearing.

In testimony whereof I alx my si BERT W.

ature. NG. 

